These helpful hints on closing twin-loop wires with a manual wire closer help save your supplies, time and money:
Matching Dials and Diameters
Most machines have a dial on the side that controls how far its wire closer will compress. The numbers on the dial correspond to the diameter of a wire once it’s closed. For example, you would turn the dial to 1/4 in. if you were binding a book with either a 1/4 in. twin loop wire with either a 3:1 or 2:1 pitch.
Why does my wire still have a gap between the tip and end of the twin loop?
Machines can be calibrated differently. You may need to turn the dial slightly looser or tighter in order to achieve your desired wire closure. For example, if there is still a gap in your 1/2 in. twin loop wire and your machine is certainly set to 1/2 in., gently turning the dial towards 7/16 in. should create a tighter closure.
Why does my wire get crushed in the closer?
Crushed wires usually occur because the diameter of the wire does not match the dial setting on your wire closer.
Some machines such as the TruBind TB-W20A Manual 3:1 Wire Binding Machine utilize the same handle for both punching sheets and operating the wire closer. When it’s time to punch, the dial must be set to "PUNCH." Sometimes even the most experienced operator forgets to turn the dial to the appropriate wire diameter setting before closing wires!